Abaixo está uma instrução que descreve uma tarefa de geração de SQL, combinada com uma entrada que fornece mais contexto sobre os esquemas de tabela disponíveis. Escreva o código SQL que responda adequadamente à solicitação
 ###Instrução: Qual é a Parte 4, quando a Parte 2 é "batt"?
 ###Tabelas: CREATE TABLE north_germanic (north_germanic_id AUTO_INCREMENT PRIMARY KEY, Class VARCHAR, Part 1 VARCHAR, Part 2 VARCHAR, Part 3 VARCHAR, Part 4 VARCHAR) CREATE TABLE metropolitan_areas (metropolitan_areas_id AUTO_INCREMENT PRIMARY KEY, Rank INT, Metropolitan area VARCHAR, Principal city VARCHAR, 10,000+ places INT, Densest incorporated place VARCHAR, Density VARCHAR) CREATE TABLE singles_finals:_9_4–5 (singles_finals:_9_4–5_id AUTO_INCREMENT PRIMARY KEY, Outcome VARCHAR, Date VARCHAR, Tournament VARCHAR, Surface VARCHAR, Opponent VARCHAR, Score VARCHAR) CREATE TABLE number_of_children_involved_in_ilo_categories_of_work_by_age_and_gender (number_of_children_involved_in_ilo_categories_of_work_by_age_and_gender_id AUTO_INCREMENT PRIMARY KEY, All Children ('000s) INT, Economically Active Children ('000s) INT, Economically Active Children (%) INT, Child Labour ('000s) INT, Child Labour (%) INT, Children In Hazardous Work ('000s) INT, Children In Hazardous Work (%) INT) CREATE TABLE provinces_of_afghanistan (provinces_of_afghanistan_id AUTO_INCREMENT PRIMARY KEY, Province VARCHAR, Map # INT, ISO 3166-2:AF VARCHAR, Centers VARCHAR, Population INT, Area (km²) INT, Language VARCHAR, Notes VARCHAR, U.N. Region VARCHAR)  
SELECT Part 4 FROM north_germanic WHERE Part 2 = batt